Piezoelectric Energy Harvesting Improvement with Complex Conjugate Impedance Matching

Brufau-Penella, J.; Puig-Vidal, M.

doi:10.1177/1045389x08096051

Cited by 44 publications

(18 citation statements)

References 10 publications

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“…Such modulus matching is consistent with much of the piezoelectric energy harvesting literature (e.g. [14], [15], [16]), but is known to be sub-optimal because it does not account for reactive power effects [27]. The results of a representative harvesting experiment are shown in Fig.…”

Section: Energy Harvestingsupporting

confidence: 81%

A multi-cell piezoelectric device for tunable resonance actuation and energy harvesting

Secord

Mazumdar

Asada

2010

2010 IEEE International Conference on Robotics and Automation

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Variable stiffness actuation and energy harvesting have been important yet separate challenges in robotics. Both functions are needed, however, for mobile robots on extended missions when actuators and generators must be used together. In this paper, we present a unique piezoelectric cellular system that combines motion generation and energy harvesting capabilities into a single, scalable device. Each of the discrete cellular units provides linear, contractile motion at 10% strain using the converse piezoelectric effect. These units may also be back-driven from environmental loading and thereby generate energy using the direct piezoelectric effect. Furthermore, each cell has the capability to toggle between a low stiffness ON state and a high stiffness OFF state, which allows an assembly of individual cells to tune both their static stiffness and structural resonant frequencies online. We demonstrate the effectiveness of our device for tuning both locomotion speed and the harvested power of an underwater flapping fin system.

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Section: Energy Harvestingsupporting

confidence: 81%

A multi-cell piezoelectric device for tunable resonance actuation and energy harvesting

Secord

Mazumdar

Asada

2010

2010 IEEE International Conference on Robotics and Automation

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“…Very high real part may make the matching process unrealizable. Brufau-Penella and Puig-Vidal [31] demonstrated complex-conjugate impedance matching for a commercially available piezoelectric bender QP40w from Mide Corporation for energy harvesting applications. A two-port grey box model was presented to obtain the transfer function used for the system identification process.…”

Section: Matching For Energy Transfer From Source To Storagementioning

confidence: 99%

A Review of Electric Impedance Matching Techniques for Piezoelectric Sensors, Actuators and Transducers

Rathod

2019

Electronics

107

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Any electric transmission lines involving the transfer of power or electric signal requires the matching of electric parameters with the driver, source, cable, or the receiver electronics. Proceeding with the design of electric impedance matching circuit for piezoelectric sensors, actuators, and transducers require careful consideration of the frequencies of operation, transmitter or receiver impedance, power supply or driver impedance and the impedance of the receiver electronics. This paper reviews the techniques available for matching the electric impedance of piezoelectric sensors, actuators, and transducers with their accessories like amplifiers, cables, power supply, receiver electronics and power storage. The techniques related to the design of power supply, preamplifier, cable, matching circuits for electric impedance matching with sensors, actuators, and transducers have been presented. The paper begins with the common tools, models, and material properties used for the design of electric impedance matching. Common analytical and numerical methods used to develop electric impedance matching networks have been reviewed. The role and importance of electrical impedance matching on the overall performance of the transducer system have been emphasized throughout. The paper reviews the common methods and new methods reported for electrical impedance matching for specific applications. The paper concludes with special applications and future perspectives considering the recent advancements in materials and electronics.

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“…Because of the dielectric behavior of the piezoelectric transducer, for an operational frequency below its resonance, an inductive load needs to be added in order to implement the complex conjugate matching of the transducer's impedance and increase the efficiency of the energy harvester based on the condition of the maximum power transfer theorem [19]. In [20], Brufau-Penella and Puig-Vidal experimentally validated this concept on a commercial piezoelectric transducer (i.e., QP40w from Mide Technology) by showing 20% increment of the generated power when an inductive element was directly connected between the transducer and a resistive load. However, this implementation was suitable for a high operational frequency only (i.e., at 935 Hz, the fourth resonant mode of the piezoelectric harvester), but not practical for low frequencies because of the very-large value of inductive reactance needed to make the complex conjugate impedance match work.…”

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confidence: 99%

A Passive Impedance Matching Interface Using a PC Permalloy Coil for Practically Enhanced Piezoelectric Energy Harvester Performance at Low Frequency

Giuliano

Zhu

2014

IEEE Sensors J.

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This paper presents an analytical and experimental study of a passive impedance matching interface based on a large inductive reactance but with a centimeter-scaled size for practically enhanced piezoelectric energy harvester performance at low frequency. Low frequency vibration normally leads to a large capacitive reactance value for small-sized piezoelectric energy harvesters and it is impractical to achieve the maximum power transfer condition by use of a conventional inductor as its volume would be of a few cubic meters. In this paper, PC permalloy material was used to implement a passive impedance matching interface in order to reduce the size of the inductor to a few cubic centimeters as it has a very high initial magnetic permeability of 6 × 10 4 H/m. The implemented interface is capable to practically perform the complex conjugate load matching of a macrofiber composite energy harvester at a frequency ≤10 Hz. The effects of the interface on the voltage, current, and power transferred to resistive loads were examined through comparisons of the results between configurations with and without the interface for applied strain levels and frequencies in the range between 480-1170-με peak-to-peak and 2.5-10 Hz, respectively. An increment of the power around 94.6% was obtained under an excitation of 480 με at 10 Hz in correspondence to an optimal resistive load reduced by over 70%. Compared with the stateof-the-art active impedance matching techniques, which use additional power sources to control the signal generated by piezoelectric energy harvesters, the developed interface is totally passive, easier to be implemented, and can be potentially used for the enhancement of vibration energy harvesting performance.Index Terms-Passive impedance matching, maximum power transfer, inductor circuit, low frequency strain energy harvesting.

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Piezoelectric Energy Harvesting Improvement with Complex Conjugate Impedance Matching

Cited by 44 publications

References 10 publications

A multi-cell piezoelectric device for tunable resonance actuation and energy harvesting

A multi-cell piezoelectric device for tunable resonance actuation and energy harvesting

A Review of Electric Impedance Matching Techniques for Piezoelectric Sensors, Actuators and Transducers

A Passive Impedance Matching Interface Using a PC Permalloy Coil for Practically Enhanced Piezoelectric Energy Harvester Performance at Low Frequency

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